JP2815570B2 - Electromagnetic blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic blower for sending air to a septic tank, a fish farm, a live fish tank, and the like. More specifically, the present invention occurs when a joint between a diaphragm and a vibrating body becomes abnormal. An electromagnetic blower configured to stop the operation when the vibrating body is biased in a reciprocating motion, that is, in a reciprocating reciprocating motion.
About.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic blower reciprocates left and right due to magnetic attraction and repulsion generated between an electromagnet and a permanent magnet attached to a vibrating body. When each diaphragm coupled to both ends of the vibrating body is performing a pump operation, the vibrating body that has reciprocated equally to the left and right due to, for example, destruction of the coupling part of the diaphragm is deflected to the left or right. When the vibrating body makes an eccentric reciprocating motion, the current is immediately cut off to the electromagnet because the magnetic pole surface of the electromagnet comes into contact with the permanent magnet as the diaphragm part breaks down and the permanent magnet wears. A blocking means is provided. As one example of the electromagnetic blower, there is a device described in Japanese Utility Model Laid-Open No. 63-100682. In the conventional electromagnetic blower, a power supply interrupting means is provided with a printed circuit board piece having a current supply pattern in a power supply circuit for supplying power to the electromagnet from a power supply.
When the vibrating body reciprocates reciprocally, a striker provided on the vibrating body is brought into contact with a printed circuit board piece and the printed circuit board piece is folded to cut off the power supply to the electromagnet.

[0003]

In the above-mentioned conventional electromagnetic blower, the striker is reciprocatingly moved by the vibrating body, and
When a printed circuit board piece is broken, the broken printed circuit board piece must be removed and a new printed circuit board piece must be attached. Therefore, a new printed circuit board piece is required, and replacement of the printed board piece is troublesome. In view of the above, an object of the present invention is to provide an electromagnetic blower having an energization cutoff means that does not require replacement of members.

[0004]

According to the present invention, in order to solve the above-mentioned problems, the vibrating body reciprocates by an attractive force and a repulsive force generated between an electromagnet and a permanent magnet attached to the vibrating body. In an electromagnetic blower in which a diaphragm coupled to an end of the vibrating body performs a pump operation, a first holder provided with a contact portion for turning on and off the energization of the electromagnet is opposed to the first holder. A second holder attached at a position, a bar for turning on the contact portion in a state where the contact portion is set at a predetermined position across the first holder and the second holder, and a bar attached to the vibrator. A striker that contacts the bar when the vibrating body reciprocates reciprocally, and displaces the bar from the predetermined position to turn off the contact portion.

According to the electromagnetic blower of the first aspect, when the vibrating body reciprocates due to, for example, destruction of the connecting portion of the diaphragm, the striker attached to the vibrating body comes into contact with the bar, and this bar is used. Is displaced from a predetermined position to turn off the contact portion and cut off the current supply to the electromagnet.
Is merely displaced from the set position without being destroyed, so that the contact portion can be turned on again by resetting the bar to a predetermined position.

According to the electromagnetic blower of claim 2,
The holding means for the first holder and the second holder is arranged such that when the bar is displaced from a predetermined position by contact of the striker, the bar is positioned outside the first holder and the second holder. Since it can be held at the holding position so as not to protrude, the trouble of searching for a bar can be omitted.

Further, according to the electromagnetic blower of claim 3,
When the movable contact is pressed by the bar, the movable contact can be regulated by the stopper so that the movable contact does not exceed a predetermined deformation amount and the contact does not cause conduction failure.

Furthermore, according to the electromagnetic blower of claim 4,
The end of the bar is formed in a spherical shape, and the portion of the movable contact that comes into contact with this end spherical surface is formed in a concave spherical shape, so that positioning when the bar is set at a predetermined position is easy. In addition, the contact with the fixed contact is ensured.

[0009]

Next, an embodiment of the present invention will be described. FIG. 1 is a side sectional view of the electromagnetic blower-1, and FIG. 2 is a plan view of the electromagnetic blower-1. FIG. 2 is a partially broken plan view of the electromagnetic blower 1 with the cover 2 and the filter cover 4 shown in FIG. 1 removed, and FIGS. 1 and 2 are not driven. The state is shown.

As shown in FIGS. 1 and 2, an electromagnetic blower-1
Are ring-shaped diaphragm mounting frames 5,
A diaphragm 8 attached to each of the diaphragm mounting frames 5 and 6 via an outer diameter edge 7 has a center portion on both sides sandwiched by a disk-shaped center disk CD made of synthetic resin and a vibrator. At both ends of the frame (vibrating body) 9, a mounting screw B provided integrally with the vibrator frame 9 is passed through the center hole of the center disk CD so that the center axis of the center disk CD coincides with the axis, and tightened with a nut. Thus, it is connected to the center disk CD.

In the drawing of FIG. 1, permanent magnets 10 and 11 are attached to the upper and lower two places on the left side of the vibrator frame 9. On the right side, permanent magnets 12 and 13 (see FIG. 2) are attached. These permanent magnets 10, 11,
And permanent magnets 10, 11, 1
Electromagnets 14 and 15 are provided on both sides of the vibrator frame 9 to cause the vibrator frame 9 to reciprocate right and left by attracting or repelling the two and 13.

The electromagnets 14 and 15 each have a core 16
The permanent magnet 1 is energized by an electric power supplied from an external commercial power supply through a plug P and a power supply code PC, and the frequency of the commercial power supply is changed.
The pole faces opposing the pole faces 0, 11, 12, and 13 are N
The poles and the S poles are alternately excited.

The electromagnets 14 and 15 are attached to the upper surface of a core base 18 formed in a concave shape with a steel plate or the like.
On the left side surface of the core mount 18, the diaphragm mounting frame 5 is provided.
And the pump 19 are integrally mounted, and the diaphragm mounting frame 6 and the pump 20 are integrally mounted on the right outer surface of the core base 18.

The pump frame PF of the pump 19 is provided with a suction valve V1 and a discharge valve V2, and the pump frame PF of the pump 20 is also provided with a suction valve and a discharge valve (not shown). While an air pipe 21 for guiding air discharged from the discharge valve V2 is connected to the pump 19,
Similarly, an air pipe 22 is connected to the pump 20, and the opposite ends of the air pipes 21 and 22 are connected to an air tank 23, respectively. And the electromagnet 1
When electric power from a commercial power supply is supplied to the coils 17 of 4 and 15, the vibrator frame 9 is reciprocated evenly in the left and right directions, and when the pumps 19 and 20 are operated, the air pumped from the pumps 19 and 20 generates the above-mentioned air. The water is supplied to an external septic tank, fish farming, live fish tank, and the like via an air tank 23, a discharge port 24, and a hose (not shown).

The air supply path in the electromagnetic blower 1 in the above state is indicated by a broken line arrow in FIG. 1 taking the pump 19 as an example. That is, the outside air is first taken in from the gap G1 with the cover-2 at the lower end of the periphery of the filter-cover-4,
Through the upper hole 2a of the air filter-3 and the cover-2,
It is taken into the inside of cover-2. Further, this air is taken into the pump 19 through the suction valve V1, and then sent out of the electromagnetic blower 1 through the path of the air pipe 21, the air tank 23, and the discharge port 24 from the discharge valve V2.

During operation of the electromagnetic blower 1 constructed as described above, the center disk CD is aged or suddenly.
When one of the diaphragms 8 coupled to the diaphragm 8 is broken at the joint, the left-right reciprocating motion of the vibrator frame 9 is not uniform left and right, and the left-right reciprocating motion is biased toward the diaphragm 8 where the joint is broken. That is, it becomes an eccentric reciprocation. Further, since the attraction and repulsion between the magnetic poles of the electromagnets 14 and 15 and the magnetic poles of the permanent magnets 10 to 13 become unbalanced, if the vibrator frame 9 and the magnetic pole surfaces of the electromagnets 14 and 15 are parallel to each other. Instead, the pole faces of the electromagnets 14 and 15 and the permanent magnets 10
As the permanent magnets 13 come into contact with each other and the permanent magnets 10 to 13 become powder and scatter, the inside of the electromagnetic blower 1 becomes too dirty to be cleaned. Therefore, it is necessary to stop the current supply to the electromagnets 14 and 15 at the very early stage of the above-mentioned reciprocating reciprocating motion and stop the motion of the vibrator frame 9.

To this end, the electromagnetic blower 1 is provided with a power cutoff device 31 for cutting off the current flow to the electromagnets 14 and 15 during the eccentric reciprocating movement of the vibrator frame 9. As shown in FIG. 2, the power cutoff device 31 includes a first holder 32 fixed to the upper surface of the core 16 of the electromagnet 14.
And a second holder 33 fixed to a position opposed to the first holder 32, that is, an upper surface of the core 16 of the electromagnet 15.
A bar 34 set at a predetermined position between the first holder 32 and the second holder 33; and a bar 34 fixed to the upper surface of the vibrator frame 9, and Strike piece 3 to be brought into contact and to displace the bar from a predetermined position
5 and 36. The striker 37 is attached to the upper end face of the vibrator frame 9 such that the strike pieces 35 and 36 are located at symmetric positions about the bar 34. A power supply code PC is connected to a terminal 32A of the first holder 32, and a lead wire 17C from the end of the coil 17 of the electromagnet 15 is connected to the other terminal 32B.

FIG. 3 shows that the striker 37 is positioned so that the strike pieces 35 and 36 are located at symmetrical positions about a bar 34 set between the first holder 32 and the second holder 33. It is a top view showing that it is arranged.
FIG. 4 is a side sectional view of FIG. 3, showing the internal configuration of the first holder 32 and the second holder 33. As shown in FIGS. 3 and 4, the first holder 32 is provided with a contact portion 32C connected to the terminals 32A and 32B. The contact portion 32C includes a movable contact 32D having elasticity connected to the terminal 32A and a fixed contact 32E connected to the terminal 32B. When the bar 34 is set at a predetermined position, the movable contact 32D is pressed by the bar 34 and comes into contact with the fixed contact 32E.

The second holder 33 is provided with a thin plate-shaped spring 33A which is pressed by the bar 34 when the bar 34 is set at a predetermined position.
The spring 33A is made of the same material as the movable contact 32D of the first holder 32, and is formed in substantially the same shape.

As shown in FIGS. 3 and 4, when the bar 34 is set at a predetermined position S1 between the first holder 32 and the second holder 33, the bar 34 becomes a movable contact. 32D
And the spring 33A. Since both ends of the bar 34 are formed in a spherical shape, and the end of the movable contact 32D and the end of the spring 33A, which are in contact with both ends of the bar 34, are formed in a concave spherical shape. Positioning when setting -34 at the predetermined position S1 across the first holder 32 and the second holder 33 becomes extremely easy. Further, the contact between the movable contact 32D and the fixed contact 32E in the first holder 32 is reliably performed. Since the thin plate-shaped knob portion 34A is integrally formed with the bar 34, the knob portion 34A is pinched by a finger to easily set the bar 34 between the first holder 32 and the second holder 33. can do.

A stopper 38 is provided inside the first holder 32 to prevent excessive deformation when the end of the movable contact 32D is pressed by the bar 34.
A stopper 39 is provided in the second holder 33 to prevent the spring 33A from being excessively deformed when the end of the spring 33A is pressed by the bar 34.

FIG. 5 shows that the strike piece 35 or 36 of the striker 37 (the strike piece 35 in FIG. 5) comes into contact with the bar 34 when the vibrator frame 9 is reciprocally reciprocated, and the movable contact 32D and the spring 33A And the bar 34 is displaced from the predetermined set position S1 between the first holder 32 and the second holder 33 to the holding position S2 by applying a force equal to or more than the elastic holding force. This holding position S2 is
When 34 is displaced by contact of strike piece 35,
The bar 34 is provided to hold the bar 34 so as not to protrude out of the first holder 32 and the second holder 33.

The holding position S2 is the first holder 32,
The second holder 33 is provided on both sides with a predetermined set position as a center, so that the bar 34 is held irrespective of which side the bar 34 is displaced. In these holding positions S2, both ends of the bar 34 are accommodated in concave portions formed by walls for holding the bar 34.

FIG. 6 shows that the bar 34 has been displaced from the predetermined set position S1 between the first holder 32 and the second holder 33 to the holding position S2 during the eccentric reciprocating movement of the vibrator frame 9. It is a side sectional view. As shown in FIG. 6, when the bar 34 is displaced to the holding position S2, the pressing force of the bar 34 is lost and the movable contact 32D is separated from the fixed contact 32E by the elastic force of the movable contact 32D in the first holder 32. Therefore, the supply of the commercial power to the electromagnets 14 and 15 is cut off, and the movement of the vibrator frame 9 stops.

After the bar 34 is displaced to the holding position S2 and the movement of the vibrator frame 9 stops, for example, the center disk C
When repair of the electromagnetic blower 1 is completed by replacing the diaphragm 8 or the like in which the joint with D has been destroyed, the bar 34 held at the holding position S2 is reset to a predetermined position S1 to reset the first position. Contact between the movable contact 32D and the fixed contact 32E in the holder 32 of the electromagnet 1
It becomes possible to supply commercial power to the power supplies 4 and 15.
Therefore, the bar 34 does not break even if it goes out of the predetermined position S1 during the reciprocating motion of the vibrator frame 9, and can be reset any number of times.

[0026]

According to the electromagnetic blower of the first aspect, when the vibrating body reciprocates due to, for example, destruction at the joint of the diaphragm, the striker attached to the vibrating body comes into contact with the bar. When the bar is displaced from the predetermined position and the energization to the electromagnet is cut off, the bar is not damaged, so after repairing by replacing the diaphragm, etc.
Can be reset to a predetermined position and used repeatedly.

According to the electromagnetic blower of claim 2,
The holding means for the first holder and the second holder, when the bar is displaced from a predetermined position by the contact of the striker, projects the bar out of the first holder and the second holder. Since it can be held so that there is no bar, there is an effect that the trouble of searching for a bar can be saved.

According to the electromagnetic blower of claim 3,
When the movable contact is pressed by the bar, the movable contact can be regulated so as not to exceed a predetermined deformation amount by the stopper, so that a contact failure due to excessive deformation can be prevented.

Further, according to the electromagnetic blower of claim 4,
The end of the bar is formed in a spherical shape, and the portion of the movable contact that comes into contact with the end spherical surface is formed in a concave spherical shape, so that positioning when setting the bar at a predetermined position is easy. In addition, there is an effect that the contact with the fixed contact is reliably performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electromagnetic blower.

FIG. 2 is a plan view of the electromagnetic blower-1.

FIG. 3 is a plan view showing the arrangement of strikers and bars.

FIG. 4 is a side sectional view showing an arrangement of a striker and a bar.

FIG. 5 is a plan view showing a state where the bar is displaced from a predetermined position.

FIG. 6 is a side sectional view showing a state where the bar is displaced from a predetermined position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic blower 8 Diaphragm 14, 15 Electromagnet 31 Energization cutoff device 32 1st holder 32A terminal 32B terminal 32C Contact part 32D Movable contact 32E Fixed contact 33 Second holder 33A Spring 34 Bar 35 Strike piece 36 Strike piece 37 Striker -S1 predetermined position S2 holding position

Claims (4)

(57) [Claims] An attraction force and a repulsion force generated between an electromagnet and a permanent magnet attached to a vibrating body cause the vibrating body to reciprocate, and a diaphragm coupled to an end of the vibrating body to pump. In the electromagnetic blower that operates, a first holder provided with a contact portion for turning on and off the energization of the electromagnet, a second holder attached to a position opposed to the first holder, A bar for turning on the contact portion in a state where it is set at a predetermined position between the holder and the second holder; and a bar attached to the vibrator when the vibrator reciprocates reciprocally. And a striker for abutting the bar and displacing the bar from the predetermined position to turn off the contact portion. 2. The bar according to claim 1, wherein the first and second holders are configured such that the bar does not protrude from the displaced position when the bar is displaced from the predetermined position due to contact of the striker. 2. The electromagnetic blower according to claim 1, further comprising a holding means for reducing the pressure. 3. The contact portion includes a fixed contact, an elastically deformable movable contact which is pressed when the bar is set at a predetermined position and comes into contact with the fixed contact, and the movable contact has a predetermined deformation. The electromagnetic blower according to claim 1 or 2, further comprising a stopper for restricting the contact so as not to cause a conduction failure when the amount exceeds an amount. 4. An end of said bar is formed in a spherical shape, and a portion of said movable contact which contacts said end spherical surface is formed in a concave spherical shape.
4. The electromagnetic blower according to 2 or 3.